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Capitalization And Short-Term Borrowings (Tables)
 12 Months Ended
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Changes In Common Stock Equity
Summary of Changes in Common Stock Equity
 Common StockPaid In
Capital		Earnings
Reinvested
in the
Business		Accumulated
Other
Comprehensive
Income (Loss)
SharesAmount
 (Thousands, except per share amounts)
Balance at September 30, 2018
85,957 $85,957 $820,223 $1,098,900 $(67,750)
Net Income Available for Common Stock
304,290 
Dividends Declared on Common Stock ($1.72 Per Share)(148,432)
Cumulative Effect of Adoption of Authoritative Guidance for Financial Assets and Liabilities
7,437 
Cumulative Effect of Adoption of Authoritative Guidance for Reclassification of Stranded Tax Effects
10,406 
Other Comprehensive Income, Net of Tax15,595 
Share-Based Payment Expense(1)19,613 
Common Stock Issued (Repurchased) Under Stock and Benefit Plans
358 358 (7,572)
Balance at September 30, 2019
86,315 86,315 832,264 1,272,601 (52,155)
Net Loss Available for Common Stock(123,772)
Dividends Declared on Common Stock ($1.76 Per Share)(156,249)
Cumulative Effect of Adoption of Authoritative Guidance for Hedging
(950)
Other Comprehensive Loss, Net of Tax(62,602)
Share-Based Payment Expense(1)
13,180 
Common Stock Issued from Sale of Common Stock
4,370 4,370 161,399 
Common Stock Issued (Repurchased) Under Stock and Benefit Plans
270 270 (2,685)
Balance at September 30, 2020
90,955 90,955 1,004,158 991,630 (114,757)
Net Income Available for Common Stock363,647 
Dividends Declared on Common Stock ($1.80 Per Share)(164,102)
Other Comprehensive Loss, Net of Tax(398,840)
Share-Based Payment Expense(1)15,297 
Common Stock Issued (Repurchased) Under Stock and Benefit Plans
227 227 (2,009)
Balance at September 30, 2021
91,182 $91,182 $1,017,446 $1,191,175 (2)$(513,597)
(1)Paid in Capital includes compensation costs associated with performance shares and/or restricted stock awards. The expense is included within Net Income Available for Common Stock, net of tax benefits.
(2)The availability of consolidated earnings reinvested in the business for dividends payable in cash is limited under terms of the indentures covering long-term debt. At September 30, 2021, $1.0 billion of accumulated earnings was free of such limitations.
Schedule Of Share-Based Compensation For SARs
Transactions for 2021 involving SARs for all plans are summarized as follows:
Number of
Shares Subject
To Option		Weighted
Average
Exercise Price		Weighted
Average
Remaining
Contractual
Life (Years)		Aggregate
Intrinsic
Value
(In thousands)
Outstanding at September 30, 2020513,180 $56.07 
Granted in 2021— $— 
Exercised in 2021— $— 
Forfeited in 2021— $— 
Expired in 2021(194,735)$60.10 
Outstanding at September 30, 2021318,445 $53.60 0.90$— 
SARs exercisable at September 30, 2021318,445 $53.60 0.90$— 
Schedule Of Share-Based Compensation For Restricted Share Awards
Transactions for 2021 involving restricted share awards for all plans are summarized as follows: 
Number of
Restricted
Share Awards		Weighted Average
Fair Value per
Award
Outstanding at September 30, 202020,000 $47.46 
Granted in 2021— $— 
Vested in 2021(20,000)$47.46 
Forfeited in 2021— $— 
Outstanding at September 30, 2021— $— 
Schedule Of Share-Based Compensation For Non-Performance Based Restricted Stock Units
Transactions for 2021 involving nonperformance-based restricted stock units for all plans are summarized as follows:
Number of
Restricted
Stock Units		Weighted Average
Fair Value per
Award
Outstanding at September 30, 2020335,773 $44.76 
Granted in 2021172,513 $37.98 
Vested in 2021(106,007)$46.35 
Forfeited in 2021(36,798)$41.22 
Outstanding at September 30, 2021365,481 $41.45 
Schedule of Share-based Compensation for Performance Shares
Transactions for 2021 involving performance shares for all plans are summarized as follows:
Number of
Performance
Shares		Weighted Average
Fair Value per
Award
Outstanding at September 30, 2020592,628 $49.18 
Granted in 2021309,470 $39.19 
Vested in 2021(165,161)$50.99 
Forfeited in 2021(136,303)$42.15 
Outstanding at September 30, 2021600,634 $45.13 
Schedule Of Long-Term Debt
The outstanding long-term debt is as follows:
 At September 30
 20212020
 (Thousands)
Medium-Term Notes(1):
7.4% due March 2023 to June 2025
$99,000 $99,000 
Notes(1)(2)(3):
2.95% to 5.50% due March 2023 to March 2031
2,550,000 2,550,000 
Total Long-Term Debt2,649,000 2,649,000 
Less Unamortized Discount and Debt Issuance Costs20,313 19,424 
Less Current Portion(4)— — 
$2,628,687 $2,629,576 
(1)The Medium-Term Notes and Notes are unsecured.
(2)The holders of these notes may require the Company to repurchase their notes at a price equal to 101% of the principal amount in the event of both a change in control and a ratings downgrade to a rating below investment grade.
(3)The interest rate payable on $300.0 million of 4.75% notes, $300.0 million of 3.95% notes and $500.0 million of 2.95% notes will be subject to adjustment from time to time, with a maximum of 2.00%, if certain change of control events involving a material subsidiary result in a downgrade of the credit rating assigned to the notes to below investment grade (or if the credit rating assigned to the notes is subsequently upgraded). The interest rate payable on $500.0 million of 5.50% notes will be subject to adjustment from time to time, with a maximum adjustment of 2.00%, such that the coupon will not exceed 7.50%, if there is a downgrade of the credit rating assigned to the notes to a rating below investment grade. A downgrade with a resulting increase to the coupon does not preclude the coupon from returning to its original rate if the Company's credit rating is subsequently upgraded.
(4)None of the Company's long-term debt at September 30, 2021 and 2020 will mature within the following twelve-month period.
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Weighted Average Assumptions Used in Estimating Fair Value The following assumptions were used in estimating the fair value of the TSR performance shares at the date of grant:
 Year Ended September 30
 202120202019
Risk-Free Interest Rate0.19 %1.63 %2.61 %
Remaining Term at Date of Grant (Years)2.802.812.78
Expected Volatility29.1 %19.3 %20.2 %
Expected Dividend Yield (Quarterly)N/AN/AN/A